[LU-16607] Speed up some sanity-lnet test cases

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Severity: 3
• Assignee: Chris Horn
• Reporter: Chris Horn

Description

some of the router test cases in sanity-lnet (e.g. test_101) take a long time to complete because the IPs used to setup gateways/routes are totally fake. The tests go a lot faster if we use IPs on the same network as the interface used for LNet.